| Champ: |  Lucas Pouille |
| Runner: |  Feliciano López |
| Score: | 4–6, 7–6(7–5), 6–4 |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| Type: | singles doubles |
| Before Name: | Stuttgart Open – Singles |
| After Name: | Stuttgart Open – Singles |
| Main Name: | Stuttgart Open |
See main article: article and 2017 MercedesCup.
Lucas Pouille defeated Feliciano López in the final, 4–6, 7–6(7–5), 6–4 to win the singles tennis title at the 2017 Stuttgart Open.[1] Pouille saved a match point en route to the title, in the second round against Jan-Lennard Struff.
Dominic Thiem was the reigning champion, but chose not to participate this year.
The top four seeds receive a bye into the second round.